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Effect of Planting Method and Weeding Regime on the Performance of Transplant Aman Rice

NA Azme
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

MD Hossain
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

MA Salam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during July to December 2014 to evaluate the effect of planting method and weeding regime on the performance of transplant Aman rice. Two planting methods viz. line transplanting and haphazard transplanting and six weed control treatments viz. no weeding, one hand weeding at 21 DAT, two hand weeding at 21 and 42 DAT, pre-emergence herbicide Rifit 500 EC at 7 DAT, pre-emergence herbicide Rifit 500 EC at 7 DAT + one hand weeding at 42 DAT and weed free were used as experimental treatments with three replications in a randomized complete block design (RCBD). Planting methods, weeding treatment and their interaction significantly influenced most of the crop characters and yield components of transplant Aman rice. The highest effective tillers hill^-1 (9.30),grain panicle^-1 (185.4), grain yield (3.89 t ha^-1), straw yield (5.57 t ha^-1), biological yield (9.54 t ha^-1) and harvest index (41.08) were obtained from line transplanting. Complete weed free treatment produced the highest total tillers hill^-1 (12.37), effective tillers hill ^-1 (9.89), grain yield (4.11 t ha^-1) and biological yield (9.94 t ha^-1).The highest total tillers hill^- 1(13.07), effective tillers hill ^-1(10.70), grain yield (4.50t ha^-1) and biological yield (10.79 t ha^-1) were obtained from line transplanting under weed free treatment. Results revealed that line transplanting with pre-emergence herbicide Rifit 500 EC at 7 DAT + one hand weeding at 42 DAT might be used to control weeds effectively and to get higher yield of transplant Aman rice.

Keywords: Planting method, Weeding, Transplant Aman, Yield, Agro-ecology

Location: Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2014

End Date: 00-12-2014

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The present study was, therefore, undertaken to evaluate the effect of planting method ad weeding regime on the performance of transplant Aman rice.

Methodology:

An experiment was carried out at the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh, during the period from July to December 2014. The experimental area was medium high land belonging to the Sonatola Soil Series under the Old Brahmaputra Floodplain, Agro-ecological Zone 9 (FAO and UNDP, 1988). The experiment included two factors (A) Planting methods viz. (i) line transplanting (M₁) (ii) haphazard transplanting (M₂) (B) Weeding regime viz. (i) no weeding (W₀),(ii) one hand weeding at 21 DAT (W₁), (iii) two hand weeding at 21 and 42 DAT (W₂), (iv) pre-emergence herbicide Rifit 500 EC at 7 DAT (W₃), (v) pre-emergence herbicide Rifit 500 EC at 7 DAT + one hand weeding at 42 DAT (W₄) (vi) weed free (W₅). The experiment was laid out in a randomized complete block design (RCBD) with three replications. The size of the individual plot was 4.0m x 2.5m. Treatments were assigned to unit plots at random. The plots were fertilized with 170-115-70-25 kg ha^-1 urea, triple superphosphate, muriate of potash and gypsum, respectively. The entire amounts of triple superphosphate, muriate of potash and gypsum were applied at the time of final land preparation. Urea was applied in three installments at 10, 20 and 30 days after transplanting (DAT). Thirty days old seedling of transplant Aman rice cv. Bina dhan-12 was transplanted on 10 July 2014; at the rate of two seedlings hill^-1 maintaining row and hill spacing of 25 cm × 15 cm, respectively. Other cultural operations were done properly depending upon the requirements. Weeding was done as per the experimental treatments. Weeds from selected plots were collected by using l m² quadrate. Dry weight of weeds were recorded after drying in an oven at 80° C for 72 hr. Five hills were selected randomly from each unit plot and uprooted before harvesting for recording necessary data. The crops were harvested at full maturity. Then the harvested crops of each plot were threshed and the fresh weights of grain and straw were recorded plot- wise. The grains were cleaned and finally the weight was adjusted to moisture content of 14%. The straw was sun dried and the yields of grain and straw plot^-1 were recorded and converted to t ha^-1.The collected data were compiled and analyzed statistically with the help of computer package program MSTAT-C and the mean differences were performed by Duncan’s Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: Progressive Agriculture 27 (3): 249-255, 2016

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From this study, it is observed that line transplanting with weed free treatment produced highest grain yield but it is not possible to keep the field weed free all times. It is revealed from the results that pre-emergence herbicide Rifit 500 EC at 7 DAT + one hand weeding performed better in obtaining considerable amount of grain yield. In conclusion, it can be said that to control weed effectively and to obtain higher grain yield in transplant Aman rice, line transplanting with pre- emergence herbicide Rifit 500 EC at 7 DAT + one hand weeding at 42 DAT could be used.

Knowledge Management: Journal